Refrigerator car door



Feb. 25, 1941. s HASELTINE 2,232,851

REFRIGERATOR CAR DOOR Filed Aug. 1, 1959 3 Sheets-Sheet 1 Feb. 25, 1941.s. B. HASELTINE REFRIGERATOR CAR DOOR Filed Aug. 1, 1939 3 Sheets-She et2 7 Irweizior Hmeltz'rze Feb. 25, 1941- s. B. HASELTINE REFRIGERATOR CARDOOR Filed Aug. 1, 1959 s Sheets-Sheet 3 I s A l l l L I l l l l I Ill llk u i Patented Feb. 25 1941 REFRIGERATOR CAR DOOR Stacy B. Haseltine,La Grange, Ill., assignor to W. H. Miner, Inc., Chicago, 111., acorporation of Delaware Application August 1, 1939, Serial No. 287,736

This invention relates to improvements in refrigerator car doors.

One object of the invention is to provide means for opening and closingsingle doors of the sliding type for refrigerator cars, which ismanually operable and controls movement of the door into and out of thedoor opening and also serves to either force the door tightly closed orpry the same partly open, and which includes a vertically reciprocatingbar having keeper engaging means at the top and bottom ends thereofengageable with keepers above and below the door opening, to perform thelast named operation, the bar being also rotatable to control and effectsaid movement of the door into and out of the door opening.

Another object of the invention is to provide in a door operatingmechanism of the character hereinbefore described keeper engaging meansfor forcing the door tightly closed and prying the same partly open, androtary crank means for supporting the door and moving the same into andout of the door opening, wherein the keeper engaging means is actuatedby manually operated, reciprocating means which is also bodily rotatableto actuate the crank means through means operatively connectingsaidcrank means to said reciprocating means for rotation therewith uponsaid keeper engaging means being disengaged from operative relation"with the cooperating keeper means.

A more specific object of the invention is to provide a mechanism as setforth in the preceding paragraph wherein the means for connecting thecrank means to the reciprocating means is in the form of relativelyslidable interlocking elements carried respectively by saidreciprocating means and said crank means and brought into and out ofengagement by reciprocation of the reciprocating means,

A further object of the invention is to provide in a door operatingmechanism'including a reciprocating bar for actuating keeper engagingmeans for forcing the door tightly closed and prying the same open,which bar is also rotatable about its axis to actuate the crank arms andmove the door into and out of the door opening, simple, efficient, andcompact means for reciprocating and rotating said bar including a singleoperating lever which is rotatable about the axis of said bar to effectrotation thereof, and is pivoted to swing with respect to the bar aboutan axis at right angles to the axis of rotation thereof to effectreciprocation of said bar,

Claims.

Other objects of the invention will more clearly appear from thedescription and claims hereinafter following.

In the drawings forming a part of this specification, Figure 1 is anelevational' view, broken away, of a side wall and a sliding door of arefrigerator ca'r, illustrating my improvements in connection therewith,said view showing the door closed. Figure 2 is a vertical sectionalView, on an enlarged scale, corresponding substantially to the line 2--2of Figure 1. Figure 3 is a vertical sectional view, similar to Figure 2,but showing the parts in different position. Figure 4 is a horizontalsectional view on a still larger scale, corresponding substantially tothe line 44 of Figure 3. Figure 5 is a horizontal sectional view on thesame scale as Figure 4, corresponding substantially to the line 5-5 ofFigure 3. Figure 6 is a broken view of the operating lever means andbar, adjacent the lower right hand end of the door, as seen in Figure 1,illustrating another embodiment of the invention, said view being on alarger scale than Figure 1. Figure 7 is a vertical sectional view,corresponding substantially to the line 1'| of Figure 6.

In said drawings 20 indicates the side wall of a refrigerator car, 2|the door opening, and 22 the single door for closing said opening. 'Thesingle door 22 is slidingly supported by top and bottom tracks 23 and 24mounted on the side wall of the car, respectively above and below thedoor opening 2| and extending lengthwise of the car. The door 22 may beof any wellknown type, and, as illustrated, has the edges: thereofbeveled tofit the correspondingly beveled edges on the walls of the dooropening 2|, the beveled edge faces of the door being provided with theusual compressible insulation to produce a tight seal when the door isclosed.

' The tracks 23 and 24 may be of any wellknown form. The bottom track24, as shown most clearly in Figures 1, 2 and 3, is in the form of anelongated bar 25; secured to the side wall of the car by brackets 26 ofZ-shaped cross i5 vertically disposed operating bars A-A, which aremounted for rotation and vertical sliding movement with respect to thedoor; top and bottom supporting crank members B-B .and (Lt-C connectedto the bars A-A; keeper engaging T-head members D-D and D-D at the topand bottom ends of said bars; a pair of top keepers E-E; a pair ofbottom keepers F-F, said top and bottom. keepers being fixed to the carwall and cooperating with the keeper engaging members of the bars A-A;operating lever means G-G for the bars A-A; and sliding carriers H-Hmounted on the bottom track and supporting the crank members CC.

The crank members B-B and C-C support the door for sliding movementalong the tracks 23 and 24 and for lateral movement toward and away fromthe side wall of said car, said crank members being rotatably supportedin bearing brackets 21-21 fixed to the top and bottom portions of thedoor. The crank members B and C are of similar design, except ashereinafter pointed out. Each crank member comprises a hollowcylindrical sleevelike bearing portion 28 journaled in one of thebrackets 21 and having a crank arm 29 extending therefrom radially, asshown most clearly in Figure 1. The crank arms 29-29 of the bottom crankmembers CC are inclined downwardly and have cylindrical bearing pins39-30 at their outer ends. The arms 29-29 of the top crank members B-Bhave their outer ends ofiset upwardly with respect to their inner ends,the portions of said arms between said inner and outer ends extendingupwardly and being angularly disposed with respect to said ends. The arm29 of each member B has a roller 3| at the outer end guided in thechannel of the track 23. The roller 3| is journaled in a well-knownmanner on the arm 29 for rotation about a vertical axis, said arm havingan upstanding boss 32 at its outer end provided with a reducedcylindrical bearing portion 33 extending through a bearing openingprovided in the central web of the roller.

As will be clear upon reference to Figure 1, the bearing brackets 21-21and 21-21 are arranged in pairs at opposite ends of the door, themembers of each pair being disposed respectively at the top and bottomof the door in vertical alignment. Each bearing bracket 21 is providedwith a pair of laterally projecting ears 34-34 by which it is fixed tothe door, the same being secured by bolts or similar fastening elementsextending through said ears. The main body portion of each bracket is ofsubstantially cylindrical form and has a vertically disposed,cylindrical bearing opening 35 in which the bearing sleeve 28 of thecorresponding crank member B or C is journaled.

The crank members C-C are supported on the carriers H-H, which are ofwell-known design and are supported for sliding movement on the track 24in a well-known manner. As shown, each carrier H is in the form of ablock or slide having downwardly extending flanges 36-36 embracing thetop 25 of the rail 24 at opposite sides. Each carrier is furtherprovided with the usual anti-friction rollers 31-31, which are journaledtherein and ride on the upper edge face of the track 24. Each carrier isprovided with a vertically disposed bearing opening between its ends inwhich the pin 30 of the corresponding crank member C is rotatablymounted, thus providing for swinging movement of the crank members withrespect to the carriers, toward and away from the side wall of the car.

The arm 29 of each crank member B and C has shouldered engagement withthe outer end of the corresponding bearing bracket 21, as clearly shownin Figures 2 and 3, to hold these crank members against downward andupward displacement, respectively. The weight of the door is thussupported on the lower crank members C-C. The inner end portion of eacharm 29 is recessed, as indicated at 38, for a purpose hereinafterdescribed. The recesses of the arms 29-29 of the top crank members B-Bopen upwardly and those of the arms of the bottom crank members C-C-open downwardly. The recess 38 of each arm, as most clearly shown inFigure 5, is defined by an outer wall 33 extending lengthwise of saidarm and a transverse inner wall 40 extending crosswise of said arm. Aswill be evident, the recess 38 of each arm is thus open at the extremityand the inner side.

The opening of the hollow cylindrical sleeve portion 23 of each arm iscentrally enlarged, as shown in Figures 2 and 3, thus providing bearingopenings 4l-4l of reduced size at opposite ends thereof. The openings4l-4l of each sleeve 28 are of circular cross section and coaxial. Asshown most clearly in Figures 2, 3, and 4, the walls of both bearingopenings 4l-4I of the sleeve 28 of each crank member B and C areprovided with diametrically opposed, vertically aligned slots 42-42 fora purpose hereinafter described.

The bars A-A are preferably in the form of cylindrical shafts and arearranged at opposite ends of the door in vertical position. Each bar Ais preferably made in upper and lower sections, joined by a cylindricalsleeve 45 into which the ends of said sections extend and to which theyare secured, preferably by welding. Each bar A has its upper and lowerends extending through the bearing sleeves 28-28 of the top and bottomcrank members B and C, respectively. These end portions of the bar havea sliding fit within the bearing openings 4l-4l and 4!-4l of saidsleeves, whereby the bar is guided for vertical movement.

Each bar A is further supported and guided between its ends in a bracket43. The bracket 43 has a pair of ears 44-44 by which it is fixed to theouter side of the door. The main body portion of the bracket 43 is ofsubstantially cylindrical form and provided with a vertically disposedbearing opening which is coaxial with the openings in the sleeves 28-28of the crank members B and C, and accommodates the bar A for bothsliding and rotary movement.

The keeper engaging heads D are four in number, each bar A beingprovided with a pair of said heads D-D, one at the upper and the otherat the lower end thereof. Each head D comprises a pair of diametricallyopposite, laterally. outwardly projecting, cylindrical lugs 48-46, thusproviding a head of T-shaped form at the corresponding end of the bar.Near the lower end, each bar is provided with a pair of diametricallyopposite, longitudinally extending ribs 41-41 adapted to interlock withthe internal slots42-42 at the upper end of the sleeve 28 of thecorresponding bottom crank member C, to eifect rotation of said crankmember with the bar, The upper end portions of the ribs 41-41 are ofuniform width, as indicated at 48-48 in Figures 2 and 3. The remainderof said ribs are tapered downwardly from said portion 48 to their--ment.

, being swung open.

lower ends. As will be evident, when the bar A is in the raised positionshown in Figure 2, clearance is provided between the tapered lower end.of each rib 4'! and the walls of the slot 42 in which it isaccommodated, thereby permitting a limited amount of rotation betweenthe bar A and the corresponding bottom crank member 0.

' that when the bar A is in the lowered position shown in Figure 3, thelugs 46-46 of the T-head D at the upper end of the bar A are seated inthe recess 38 of the arm 29 of the corresponding crank member B so thatthe lugs 46 willhave shouldered engagement withthe wall 36 of saidrecess to lock said crank member B to the bar A for rotation therewith,as clearly indicated in Figure 5. As will be seen upon reference toFigure 5, the inner side of the wall 39 is recessed, as indicated at 49,to accommodate the end of the round bar A.

The keepers E-E and F-F are of similar design except as hereinafterpointed out. As shown in Figures 1, 2, and 3, the keepers E-E aremounted above the door opening 2| at the opposite ends of the same, andthe keepers F-F are mounted below said opening at opposite ends thereof.The keepers E and F of each set at each end of said opening are invertical align- Each keeper E-F is in the form of a casting havingsecuring ears 50-56 projecting from opposite sides thereof. The keepersare fixed to the car wall by bolts or similar securing elementsextending through the ears 511-50. Each of the keepers E and F isprovided with an inclined camway the camways 5|-5| of the top and bottomkeepers being inclined in the samedirection, that is, downwardly awayfrom the side walls of the car.

The camway of each keeper E is defined by a continuous front wall 52 anda centrally slotted back wall 53, parallel to said front wall, the slotof said back wall extending vertically and being continued through thebottom portionof the casting. This slot is of a width to freely acthewall 39 on the inner end portion of the crank arm 29 of the crank memberat the upper end of the corresponding bar A when the door is in theclosed position shown in Figure 2. This opening 54 also providesclearance for the lugs 46-46 of the bar A when the door is As clearlyshown in Figure 2, the front wall 52 of the keeper E terminates in astraight upper end portion I54, substantially parallel to the side wallof the car for locking the bar A against accidental movement along theguideway due to outwardly acting forces exerted on said bar.

The camway 5| of each bottom keeper F is also defined by substantiallyparallel front and back walls, indicated respectively by 55 and 56.

The front wall 55 is' vertically slotted from end .to end to accommodatethe lower end portion of the bar A. The-slotted arrangement of the frontwall 55 provides flanges at opposite sides of the keeper casting, whichoverhangthelugs 46-46 of the T-head at the lower end of the bar A. Theouter lower section of the casting is cut away, as indicated at 51, toprovide clearance for the lugs 46-46 of the bar A when the door is beingswung open, as hereinafter pointed out.

The front wall 55 of the keeper F also terminates in a straight upperend portion similar to the wall portion I54 of the upper keeper E andserves a similar purpose, said wall portion of the keeper F beingindicated by 58. Each of the keepers E and F has an outwardly facingflat l5 abutment face-59 at the bottom thereof, which serves as alimiting stop for the lugs 46-46 of the T-heads at the top and bottomends of the bar A, thereby assuring alignment of the lugs with thecamways 5 l-5l of the keepers E and F when the door is in the partlyclosed position shown in Figure 3. These abutment faces 59-59 are at thelower ends of the back walls 53 and 56 of the keepers E and F and arecontinuous with said walls, whereby thelugs of the T-heads D-D of thebar A will be properly guided to enter the ways 5|-5| ofsaid keepers.

I The operating lever means G for effecting vertical sliding movement ofthe bar A and rotation of said bar about its longitudinal axis comprisesan operating handle lever 60 pivotally hung on a bracket 6|, which ismounted for rotation about the bar A, and a slotted guide block'62 fixedto the bar A, with which trunnions 63-63 on the lever cooperate. V 5

The bracket BI is cut out, as indicated at 64, thereby providinghorizontally disposed top and bottom sections 65-65 which embrace thebracket 43 from above and below. The sections 65-65 are provided withvertically aligned bearing openings 66-66 through which the bar Aextends. The bracket 6| is thus mounted for rota tion on the bar A andis supported and held against movement in a direction lengthwise of thebar A by the bracket 43. The bracket 6| has a depending arm or lug 61which is offset outwardly with respect to the bar A. The block 62 ispreferably welded to the bar A, being cut out at its forward side toembrace substantially half the circumference of the bar. projectsrearwardly of the bar A, as seen in Figures 2 and 3, and hassubstantially fiat side faces. This block terminates clear of the frontface of the door 22 so that rotary motion of the bar A will not beinterfered with. At'opposite .sides I thereof, the block 62 is providedwith horizontally disposed guide slots 68-68.

The handle lever is forked at its inner end, said forked portion, whichis indicated by 69, embracing the lower end of the arm 61 of the 60bracket 6| at opposite sides. A pivot pin 16 extending through suitableopenings in the lower end of said arm 61 and through said forked portion69 of the lever 69 pivotally supports the lever on said bracket. Thepivot pin receiving openings of the fork of the lever are preferablyslightly elongated in a horizontal direction to avoid binding of thelever on said pivot during swinging movement thereof. The forked portion69 of the lever 60 extends at an angle to the main body 70 portion ofsaid lever, as clearly shown in Figures 2 and 3,. and has the trunnions63-63 located at the outer end portion'thereof. These trunnions projectfrom the inner sides of the armsof the forked portion69j and extend intoand ride The block 62 50 e within the horizontal slots 68-68 of theblock 62, which is fixed on the bar A. As will be evident, when thehandle lever 60 is swung from side to side in a horizontal plane, rotarymovement will be transmitted to the bar A through said handle lever, thebracket 6| swinging with the lever about the axis of rotation of saidbar, and the block 62, which is fixed to the bar A and snugly embracedon its flat sides by the forked end of the lever, compelling rotation ofthe bar with said lever.

As will be further evident, when the lever 60 is swung in a verticalplane about the pivot 10, sliding movement is imparted to the bar Athrough the slot and trunnion connection between the bar A and theforked end of the lever, the trunnions 63-63 of the lever travelinginwardly and outwardly along the slots 68-68 as said trunnions are movedin the arc of a circle about the axis of the pivot pin ID of said lever,thereby transmitting reciprocating movement to the bar A through themedium of the block 62, which is fixed to said bar.

As most clearly disclosed in Figure 1, the handle lever 60 is providedwith a laterally offset hand grip portion H, which clears the bearingbracket 21 when the handle lever is dropped to the pendant positionshown in Figures 1 and 2. The portion of the lever connecting said handgrip H to the main body portion thereof is disposed at substantiallyright angles to said hand grip and main body and is indicated by 12. Theportion '12 of the lever is utilized in locking the mechanism inposition to hold the door closed.

As shown, the usual locking latch means, indicated by 1'3, is employedto engage over the portion 12 of the handle 60 to positively lock saidhandle lever against movement, thus locking the door in the customarymanner.

Holding latch means, indicated by 14-14, is also provided for holdingthe levers 60-60 against rotation when swung against the door inhorizontal position. This holding means may be of any well-known form, amember having an upstanding flange in back of which the lever 60 isdropped, being preferably employed.

In assembling the mechanism, the bearing bracket 21, together with thecrank member B, the bearing bracket 43, and the supporting bracket 6|with the handle lever 60 attached, are applied to the upper section, andthe bearing member 21, together with the crank member C, are applied tothe lower section of the bar A before these two sections are joined. Thetwo sections of the bar are then joined by the sleeve 45 and weldedthereto. The parts may be then applied to the car door and car wall inany convenient manner, the crank members B and C being preferablyengaged with the upper track and the carrier on the lower track beforethe supporting bearing brackets 21-21, and 43 are secured to the door.The keepers E-E and F-F may be secured to the car wall either before orafter application of the operating mechanism to said door.

The operation of my improved door mechanism, as disclosed in Figures 1to 5 inclusive, assuming the door is in the closed position shown inFigures 1 and 2, is as follows: After unlocking the latch members 13-73in the usual way, each operating lever 60 is swung outwardly andupwardly from the pendant position shown in Figures 1 and .2 to asubstantially horizontal position, thereby moving the parts from theposition in Figure 2 to that shown in Figure 3. As

will be evident, the levers 60-60 may be operated either simultaneouslyor successively. During the upward swinging movement of the lever 60 ofeach operating mechanism, sliding movement is imparted to the bar, A, ashereinbefore pointed out. This sliding movement is in a downwarddirection and. the lugs 46-46 of the T-heads D-D at the top and bottomends of the bar travel downwardly in the guideways 5l-5l of the keepersE and F, camming the door 22 outwardly until the position shown inFigure 3 is reached. During this downward movement of the bar A, thetapered ribs 41-41 on the bar travel inwardly of the bearing sleeve 28of the crank member C until the locking portions 48-48 of said ribs areseated in the slots 42-42 of said sleeve to lock the crank member to thebar A for rotation therewith. At the same time, the lugs 46-46 of theT-head D at the upper end of the bar A will have passed out of the way5| of the top keeper E and into the recessed portion 38 of the crank arm29 of the crank member B and to operative engaging position with respectto the wall 39 of said recessed portion 38, as shown in Figures 3 and 5,to effect rotation of the crank member B in unison with the shaft A whenthe latter is rotated.

As shown in Figure 2, when the camming operation has been completed, thelugs 46-46 of the lower T-head D of the bar A will have entirely clearedthe guideway 5| of the keeper F and are free to pass out of said keeperthrough the opening provided by the cut away portion 57. Similarly, thelugs 46-46 of the T-head D at the upper end of the bar are free to leavethe keeper E through the opening provided by said cut away portion 54.

As will be evident, when the levers 60 are thus operated, there will beslight rotary movement or angling of the crank members with respect tothe door as the same is being forced out of the door opening. Theclearance provided by the taper of the ribs 41-41 of the bar A allowsfor this angling without any danger of binding of the, parts of theoperating mechanism. A

When the door has been freed from. the door same direction in moving thedoor out of the door opening, the same being swung toward the door topositions to the right of the bars, thus effecting contraclockwiserotation of said bars.

The door 22 is thus moved out of the door opening 2|, clear of the sidewall of the car, so that the door may be slid along the tracks 23 and 24to entirely clear the door opening. In order to prevent accidentalmovement of the crank arms and consequent displacement of the doorinwardly or outwardly with respect to the tracks while the door is beingslid along the tracks, the handle lever 60-60 are preferably latched inposition by the latch members 14-14.

In closing the door, the operation is substantially the reverse of thathereinbefore described. The door is slid along the tracks 23 and 24 intoposition in front of the door opening 2|. The handle levers 60-60 arethen disengaged from the latch means 14-14 and swung through HICSH,"

of 90, thereby rotating the crank members B and C and moving the door tothe position shown in Figure 2. At the end of this part of theoperation, the lever arms 60-66 are disposed in horizontal position,extending outwardly at right angles to the plane of the door. In movingthe door to the position shown in Figure 2, the keeper engaging T-headsD-D are brought into engagement with the abutment faces 59-59 of thekeepers, thus positively arresting further inward movement of the doorand aligning the lugs 46-46 and 46-46 of the T-heads with the guideways5I-5I of the top and bottom keepers E and F. When the parts are in thelast described position, each operating lever 60 is swung downwardly topendant position, as shown in Figures 1 and 2, thereby raising the bar Avertically and moving the T-heads D-D upwardly along the guideways 5I-5Iof the keepers to cam the door tightly shut. The levers which are inpendant position when the door has been forced tightly closed are thenlooked and sealed in the usual manner by the latch members 13-13.

Referring next to the embodiment of the invention illustrated in Figures6 and 7, my improvements involve a modified form of lever actuatingmeans for the bars A shown in Figures 1 to 5 inclusive. The leveractuating means disclosed in Figures 6 and '7 comprises a handle leverill, a link I12, and a supporting bracket I13. The supporting bracketI13 is mounted in a manner similar to the supporting bracket 6|,hereinbefore described, and is of substantially the same design. Thesupporting bracket I13 is rotatable on the bar A and held againstlengthwise movement with respect to the same by engagement with thebearing bracket 43 in the same manner as the supporting bracket 6 I. Thebracket I13 has a depending arm I14 having a transverse pivot pinreceiving opening in its lower end. The link I12 is forked at its upperend, and the arms of said forked end embrace the depending arm I14 ofthe bracket I13, and is pivotally connected thereto at its upper end bya pivot pin extending through said arms of the fork and the pin openingin the arm I14 of the bracket I13. The handle lever I1I is pivotallyconnected to the bottom end of the link I12 by a pivot pin I15 extendingthrough the link and the lever, the lever being forked to embrace thelink. The lever I1I has an angular inner end section I16 extendingbeyond said pivotal connection I15, said extension I16 being forked andhaving the arms of the fork embracing the bar A. The free ends of thearms of said forked section are pivotally connected to the bar A by apin 11 extending through said bar and the fork of the handle lever I1I.As will be evident, when the handle lever I1I is raised from the pendantposition shown in Figures 6 and '1 toward the horizontal position, thebar A is moved downwardly through the toggle action of the linkconnection with the bracket I13 and when the lever is again dropped topendant position the bar A is moved upwardly, thus, the bar A isreciprocated in the same manner as in the structure disclosed in Figures1 to 5 inclusive, to force the door open and closed by engagement of theT-heads D-D with the corresponding keepers. As will be further evident,the handle lever I1I being connected to the bar A by the pivot pin 11,the bar A is rotated with the lever in the same manner as described inconnection with the structure disclosed in Figures 1 to 5 inclusive. Thecrank arms are thus rotated with the bar A about the axis of the same tomove the door out of and into the door opening.

I have herein shown and described what I now consider the preferredmanner of carrying out my invention, but the same is merely illustrativeand I contemplate all changes and modifications that come within thescope of the claims appended hereto.

I claim:

1. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of swingable means journaled on the door for supportingsaid doorand u ding the same into and out of the door opening; a keeperengaging bar mounted on the door for rotary and sliding movementlengthwise re-' verse directions, said bar having keeper engaging lugsat the top and bottom ends thereof; top and bottom keepers on the carwall respectively above and below the door opening having inclinedcamways with which said lugs of said bar are engageable to force thedoor tightly closed when said bar is slid in one direction, and pry saiddoor partly open when said bar is slid in the other direction, thecamways of said top andbottom keepers being inclined in the samedirection; and manually actuated lever means swingable in one plane forsliding said bar in reverse directions to engage the same with thekeepers and disengage it therefrom, and swingable in another plane forimparting rotation to said bar.

2. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of a top and bottom supporting crank member journaled onsaid door; a bar mounted on said door for rotary movement and slidingmovement lengthwise in reverse directions; keeper engaging lugs on saidbar; top and bottom keepers on the car wall having cam slots with whichsaid lugs are engageable to force the door tightly closed when said baris slid in one direction and pry said door partly open when said bar isslid in the other direction, said slots of the top and bottom keepersbeing inclined in the same direction; means-0n one of said. crankmembers with which said bar has shouldered engagement when said lugs aredisengaged from said keepers to lock said last named crank member to thebar for rotation in unison therewith; and manually actuated meansoperatively connected to said bar for reciprocating and rotating thesame.-

3. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of a supporting crank member having a journal portionrotatably mounted on the door; a bar mounted on said door for rotarymovement and sliding movement lengthwise in reverse directions, said barextending through said journal portion of the crank member; keeperengaging lugs on the top and bottom ends of said bar; top and bottomkeepers on the car wall having inclined camways with which said lugs ofsaid bar are engageable to force the door tightly closed when said baris slid in downward direction to move said lugs downwardly along saidcamways and pry said door partly open when said bar is slid in an upwarddirection to move said lugs upwardly along said guideways; radiallocking projections on said bar and cooperating locking shoulders onsaid journal portion of one of said crank members, said lockingprojections being moved into engagement with said shoulders when saidkeeper lugs are disengaged from the keepers; and manually actuated meansoperatively connected to said bar for reciprocating and rotating thesame.

4. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of supporting crank members rotatably mounted on thedoor at the top and bottom thereof; a rotary actuating bar connected toboth of said crank members, said bar being slidable lengthwise withrespect to said crank members; keeper engaging means on said bar at thetop and bottom ends thereof; keepers at the top and bottom of the doorwith which said keeper engaging means cooperates to force the doortightly closed when the bar is slid in one direction and pry the sameopen when said bar is slid lengthwise in a reverse direction; and meansfor imparting rotary and sliding movement to said bar.

5. In .a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of keepers on the car above and below the dooropening; a reciprocating bar on the door simultaneously engageable withsaid keepers for forcing the door tightly closed when said bar is movedbodily in one direction, and prying the same partly open when said baris bodily moved in a reverse direction, said reciprocating bar beingrotatably mounted on the door; actuating means for imparting rotary andreciprocating movement to said bar; pivoted supporting arms at the topand bottom of the door for guiding the door into and out of the dooropening; and means operatively connecting said arms to said bar toimpart rotary movement to said arms from said bar to swing said arms andmove the door into and out of the door openmg.

6. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of swinging arms journaled on said door at the topand bottom thereof for guiding the door into and out of the dooropening; a vertically disposed operating bar supported on said door forrotation, and sliding movement lengthwise of its axis of rotation; topand bottom keeper engaging cam means on the upper .and lower ends ofsaid bar; means operatively connecting said bar to at least one of saidcrank arms to rotate the latter to move said door into and out of thedoor opening; means for imparting rotary and sliding movement to saidbar; and top and bottom keepers on said car above and below said dooropening having camways inclined in the same direction engagedrespectively by the top and bottom keeper engaging cam means of said bardurin sliding movement of said bar to either force the door tightlyclosed or pry the same partly open.

'7. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of means for either moving said door into the dooropening to partly closed position or withdrawing said door from the dooropening from said partly closed position, including a supporting crankarm having a sleevelike journal portion rotatably mounted on the door;means for forcing said door tightly closed from said partly closedposition, or prying said door partly open, including a keeper having acamway, a bar slidable in said sleeve and having a head engageable withsaid camway; lugs on said bar slidable into shouldered engagement withsaid journal portion of the crank arm to operatively connect said crankarm to said bar for rotation in unison therewith; and means forimparting rotary and sliding movement to said bar.

8. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of keepers at the top and bottom of said door opening;rotatable crank members at the top and bottom of the door supporting thesame for in and out movement; a vertical operating bar rotatably andslidably mounted on the door and having keeper engaging means at the topand bottom ends thereof movable bodily with said bar for forcing saiddoor tightly closed when said bar is slid lengthwise in one directionand prying the same open when said bar is slid lengthwise in a reversedirection, said crank members being rotatable with said bar; asupporting bracket on said door mountedfor rotation about the axis ofrotation of said bar; an operating lever pivotally supported by saidbracket for swinging movement in a plane parallel' to the longitudinal.axis of said bar; and means connecting said lever to the bar forrotating said bar when the lever is swung about the longitudinal axis ofsaid bar and reciprocating said bar when the lever is swung in saidplane parallel to said axis of rotation of the bar.

9. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of means for opening and closing said door including anoperating bar rotatably and slidably' mounted on said door; a supportingbracket on said door rotatable about the axis of rotation of said bar;and an operating lever pivoted between its ends on said bracket forswinging movement on an axis at right angles to the axis of rotation ofsaid bar, the inner end of said lever having'a sliding pivotalconnection with said bar for imparting reciprocating movement tosaid barwhen the lever isswung on its pivot, said lever having drivingconnection with said bar for rotating the same.

10. In a door construction for refrigerator cars having'a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of means for opening and closing said door including avertically disposed bar mounted on said door for rotary and axiallysliding movement, a section of said bar having horizontally disposedguide slots on opposite sides thereof. said sides at said slotspresenting'flat abutment faces, a supporting bracket mounted on saiddoor for rotation about the axis of said bar, said bracket being heldagainst movement lengthwise of said bar, an operating lever having aforked end portion embracing said slotted section of the bar from.opposite sides to lock said bar to said lever for rotation therewithabout the longitudinal axis of the bar, trunnions on said fork of thelever guided in said slots, and pivot means between the ends of saidlever pivotally connecting said lever to said supporting bracket forswinging movement ina vertical plane.

111 In a door construction for refrigerator cars havingawallmemberprovided with a door opening, the combination with a door for closingsaid opening; of means for opening and closing said door including avertically disposed rotary bar mounted on said door for rotary andaxially sliding movement, an operating lever, a slot and pin connectionbetween said lever and bar at the inner end of said lever, and a bracketto which said lever is pivoted between its ends for swinging movement ina vertical plane, said bracket being supported on said door for rotationabout the axis of said bar and held against displacement lengthwise ofsaid bar.

12. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door for closingsaid opening; of means for opening and closing said door including avertically disposed rotary bar mounted on the door, an operating leverpivoted at its inner end to said bar for rotation on a horizontal axis,a supporting bracket held against movement in vertical direction androtatably mounted on said door for swinging movement about the axis ofsaid bar, a link supporting said lever on said bracket, said link havingits opposite ends pivoted to said bracket and lever respectively forswinging movement on horizontal axes.

13. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of keeper means on the car above and below said dooropening; a longitudinally slidable bar on said door and having keeperengaging lugs at the top and bottom ends thereof and cooperating withsaid keepers to either force the door tightly closed or pry the samepartly open when said bar is slid lengthwise; manually actuated meansfor imparting either rotary or longitudinal sliding movement to saidbar; driving lugs on said bar; and rotary top and bottom crank armssupporting said door and with which said driving lugs and keeperengaging lugs at the top of said bar have shouldered'engagementrespectively for rotating said crank arms to move said door either to orfrom said partly closed position.

14. In a door construction for reirigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of top and bottom crank members for supporting saiddoor for movement into and out of the door opening, said crank membershaving vertically aligned journal sleeve portions rotatably mounted onthe door; a vertically disposed operating bar having its upper and lowerends extending through said sleeves said bar being slidably guided bysaid sleeve portions; keepers on the car above and below said dooropening with which said bar is engageable; and manually actuated meansfor successively imparting rotary and sliding movement to said bar tosuccessively impart rotary movement to said crank members to move thedoor partly closed, and sliding movemerit to said bar lengthwise in onedirection to engage the same with said keepers to force the doorcompletely closed.

15. In a door construction for refrigerator cars having a wall memberprovided with a door opening, the combination with a door adapted toclose said opening; of guide tracks on said wall member above and belowthe door opening; top and bottom crank members mounted on the door forrotation about vertically aligned axes; a crank arm on each crankmember; means for pivotally and slidingly supporting the outer ends ofsaid arms on the tracks; a vertically disposed operating bar on thedoorl connected to said top and bottom crank members for rotationtherewith, said bar being concentric with the axis of rotation of saidcrank membersand being slidable lengthwise of said axis of rotation;keeper engaging means rigid with the top and bottom ends of said bar;and keepers on the car having cam slots with which the keeper engagingmeans cooperates during sliding movement of the bar to either force thedoor tightly closed or pry the same partly

